Name the main roles when it comes to the scrum?

The main roles in the scrum are:

1) Scrum team: The scrum team comprises of individuals who work together to achieve the best results for any given task. The requested product is delivered by a committed scrum team with a deep bond.

2) Scrum master: As the name suggests, the scrum master is the individual responsible for the proper execution and working of the entire team. The scrum master is a leader as well as a coach. It is his duty to ensure that the team performs at their best, being productive towards both, the scrum as well as the end sprint goal.

3) Product owner: The responsibilities of the product owner include the delivery of a complete and clear picture with respect to what is to be built. The product owner also conveys the same idea to the team.